Supporting device for electrical apparatus



l g- 1931- R. CROW 1,817,239

SUPPORTING DEVICE FOR ELECTRICAL APPARATUS 57 i9 60 I zNyeEgonw 1255.5.

ATTORNEYJ Aug. 4, .1931. L. R. cRow 1,817,239

SUPPORTING DEVICE FOR ELECTRICAL APPARATUS 3 Sheets-Sheet 2 I j E 5 I l I I gs] l INVENTOR ATTORNEYJ Aug. 4, 1931. L. R. cnow 1,817,239

SUPPORTING DEVICE FOR ELECTRICAL APPARATUS Original Filed May 4, 1928 3 Sheets-Sheet 3 I I 4- i a4 1 7 7/ 7g ATTORNEY-J Patented Aug. 4, 1931 PATENT OFFICE LEONARD R. CROW, OF TERRE HAUTE, INDIANA SUPPORTING DEVICE FOR ELECTRICAL APPARATUS Application filed May 4, 1928, Serial My invention relates to improvements in supporting device for electrical apparatus, and it consists in the combinations, constructions, and arrangements herein described and claimed.

-An object of myinvention is to provide a supporting device for electrical apparatus by means of which various electrical apparatuses, including electromagncts, may be supported in various positions for producing numerous electrical experiments.

A further object of my invention is to provide a device of the type described in which the same supporting means may be used in various ways for accomplishing various experimental results.

A further object of my invention is to provide a device of the type described which is simple in construction, which may be readily assembled, and which is durable and efiicient for the purpose intended.

A further object of my invention is to provide a device of the type described which has novel means for completing circuits for electrically connecting the electromagnets with a source of current irrespective of the positions in which the electromagnets are placed. v

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a front elevation of my device illustrating'the members thereof in one position and having a portion thereof broken away,

Figure 2 is an enlarged section substantially along the line 22 of Figure 1,

Figure 3 is a front elevation of my device illustrating the members in a different posi- 5 tion,

Figure 4c is a top plan view of a portion of my device,

Figure 5 is a front elevation of my device showing the members in still another position,

No. 275,244. Renewed May 18, 1931.

Figure 6 is an end elevation of my device assembled as shown in Figure 5, and

Figure 7 is a top plan view of my device.

In carrying out my invention, I provide a base 1 having upright plugs 2 removably disposed in openings 3 and arranged to receive one end of lower supports L and 5. The lower support 4: is provided with an elongated slot 6 together with openings 7 and 8. The lower support 5 is provided with openings 9 and 10 which are in alignment with the openings 7 and 8, respectively. The lower support 5 is also provided with an opening 11 which is in substantial alignment with the slot 6. The lower sunpoz I l and 5 are provided with connecting 5'. 12 which are rigidly secured therew b any suitable means, such as pins 13. Upper or extension supports 14 and 15 have their lower ends disposed in engagement with the plugs 12 and in this manner are removably secured to the lower supports 4 and 5. The upper supports 14 and 15 are provided with aligned openings 16 and 17, respectively.

Top-engaging plugs 18 are disposed in the upper ends of the extensions 14 and 15 and are arranged to be received in openings 19 in a horizontal top 20. Referring to Figure 7 it will be noted that the top 20 is provided with an elongated guide slot 21 for a purpose hereinafter described. The top 20 is provided with four pairs of sockets numbering 22 and 23, 24c and 25, 26 and 27, and 28 and 29. These sockets extend through the top 20 and have their openings positioned adj accnt the under surface 30 of the top. A conductor 31 is embedded in a groove 32 and has its ends secured to the sockets 22 and 24:; a conductor 33 is embedded in a groove 3a and has its ends se- I I cured to the sockets 23 and 25; a conductor 35 is embedded in a groove 36 and has its ends secured to the sockets 26 and 28, and a conductor 37 is embedded in a' groove 38 and has its ends secured to the sockets 27 and 29.

The base 1 is provided with three pairs of sockets numbering 39 and 10, s1 and a2, and 43 and 4A. Knife switches 45 and 46 are disposed at each end of the base 1 as shown in Figure 7. Terminal posts 47 and 48 of the switch 45, and terminal posts 49 and50 of the switch 46 are electrically connected to the sockets 39 and 40, respectively. The terminal post 51 of the switch 45 is electrically connected to the socket 41 and the terminal post 52 of the same switch is electrically connected to the socket 42. The

- terminal post 53 is electrically connected to the socket '43, and the terminal post 54 is electrically connected to the socket I have provided two cable-supporting and actuating members 55 and 56' which are identical in construction, and. a description of one will apply to both. For a matter of description, we will select the cableeholding and actuating member 55 which is provided with a frame consisting of parallel .to engage with the teeth of the ratchet wheel 62. A tape or cable 64 has one end rigidly secured to the drum 60 and the. other end secured to an eyelet screw 65. I have numbered the corresponding parts. of the cable-supporting and actuating member 56 with numbers 57, 58, 59, 60, 611, 62, 63.,

614 and 65 for the purpose of distinction,

these numbers relating to the like members of the cable-supporting and actuating member 55.

I have; shown additional supporting memhere such as relatively long supporting bars 66 and 67 which have/their ends threaded so as to receive wing nuts 68- 01? the like.

1 Relatively short threaded supporting bars 6.9 and 70 are also provided and arranged to receive the wing nuts 68. 'Grippin g rings 71, and 72 are provided with internal- 1y; threaded integral posts .73 and 74,. respectively, which are arranged to receive the eyelet screws 65 and 65 From the foregoing description of the various parts of the device, the operation thereof may be readily understood. Myinvention may be used in numerous ways to produce numerous electrical experiments. One way in which my device may be used is illustrated in Figure l in which the relatively long supporting bars 66 and 67 are connected at their inner ends by means of a thumb nut 75. A pendulum 76 having a U-shaped portion 77 is pivotally mounted upon the supporting bars 66 and 67. A disc removably secured to the pendulum 76 by any suitable means, such as a bolt 79.

7 The disc: 78-ma-y be of any desired material.

/ knobs 61 61.

Electromagnets 80 and 81 are disposed in the gripping'rings 71 and 72 and are held at spaced-apart positions by the relatively shortsupporting bars 69 and owing to the fact that the outer ends of the electromagnets are secured to the inner ends of the relatively short supporting bars. The height of the inner ends .of the electromagnets and 81 may be adjusted by rotating the drums 60 and 60 by rotating the hand The electromagnets are held in their adjusted positions by the pawls 6'3 and 63" which engage with the ratchet wheels 62 and 62", Relatively short sets of cords 82 and 83 may be electrically connectedtc the electromagnets. SO-and L, respectively, and to the sockets41, 42 and 43, 44, respectively. By connecting sockets 39 and 40. with a. circuit of a, source of current, the switches 45 and 46 may be closed, thus. allowing the source of eurrent, topass through either. the electromagnets. 89 or the electromagnet 8.1, or betln Different effects may be had. upon the as it. is swung between. the electromagnets,

In Figure 3., I. hate shown the deviceas sembled for another form of experiment. In Eigure 3 I have secured the gripping rings 71 and. 72 to the relatively short. sup.-

porting bars 69' and '76., The electromagnets 80 and 81 are disposed in the gripping rings 71 and 72- and are thus held against lateral displacement. The eyelet screws, 65 and: 65- are disposed in the upper ends of the electromagnets 86 and 81, respectively, and the electromagnets are thus supported by the cables 64 and 64"; Al'motor- 84 is disposed upon the base 1 and is provided with a disc such as that shown at 78 which is secured to a shaft 85 by means, of. the thumb nut 75.. The disc 78 is arranged to be rotated.v The relatively short sets of cords 82 and 83 have their upper plugs disposed in the sockets, 28, 29 and 24, 25., respectively.

The lower plugs of the. sets. of cords 82 and 8.3 are electrically connected to the. electromagnets 80'. and. 81,. respectively.

Relatively long sets of cords 86 and 87 extend. from the sockets 41, 42 and 43", 44,. respectively, to the sockets 26, 27 and the sockets 22, 23, respectively, Assuming that the sockets 39 and 40 are in electrical connection with a source of current, by closing either or both the switches 45- and 46, the

source of current may pass through the supports 4 and 5, respectively. The lower supports 4 and 5 may be rotated so as to allow the supporting bars 69 and 70 to extend outwardly instead of inwardly as shown in Figures 1 and 8. The gripping rings 71 and 72 are disposed upon the outer ends of the supporting bars 69 and 7 0. The cables 64 and 64 are passed through the gripping rings and secured to the ends of a core 88. The ordinary cores of the electromagnets and 81 are removed and the electromagnets are disposed concentrically with the core 88. The relatively short sets of cords 82 and 83 extend from the sockets 41, 42 and 43, 4:4; to the sockets in the electromagnets 80 and 81, respectively.

The illustrations disclosed in Figures 1, 3, 5 and 6 are merely three ways in which my device may be used. There are, however, numerous other ways in which my device may be used.

I claim:

1. A device of the type described comprising a base, lower supports, means for securing one of the ends of said lower supports to said base, upper supports, means for securing said upper supports to the other ends of said lower supports, a top, means for securing said upper supports to said top, said supports having openings therein, relatively long supporting bars extending through openings in the upper supports, a thumb nut for connecting the inner ends of said relatively long supporting bars, and a pendulumlike member, said relatively long supporting bars being adapted to pivotally support said pendulumlike member.

2. A device of the type described comprising a base, lower supports, means for securing one of the ends of said lower supports to said base, upper supports, means for securing said upper supports to the other ends of said lower supports, a top, means for securing said upper supports to said top, said supports havin openings therein, relatively long supporting bars extending through openings in the upper supports, a thumb nut for connecting the inner ends of said relatively long supporting bars, a pendulumlike member, said relatively long supporting bars being adapted to pivotally support said pendulumlike member, electromagnets and relatively short supporting bars extending through openings in said lower supports each of said short supporting bars being adapted to have one of said electro-magnets secured to its inner end.

3. A device of the type described comprising a base, lower supports, means for securing one of the ends of said lower supports to said base, upper supports, means for se curing said upper supports to the other ends of said lower supports, a top, means for securing said upper supports to said top, said through openings in said lower supports each of said short supporting bars being adapted to have an electromagnet secured to its inner end, and means cooperating with said relatively short supporting bars for adjustably supporting said electromagnets.

4:. A device of the type described comprising a base, lower supports, means for securing one of the ends of said lower supports to said base, upper supports, means for securing said upper supports to the other ends of said lower supports, a top, means for securing said upper supports to said top, said supports havin openings therein, relatively long supporting bars extending through openings in the upper supports, a thumb nut for connecting the inner ends of said relatively long supporting bars, said relatively long supporting bars being adapted to pivotally support a pendulum having a metallic disc secured to the lower end thereof, relatively short supporting bars extending through openings in said lower supports each of said short supporting bars being adapted to have an electromagnet secured to its inner end, means cooperating with said relatively short supporting bars for adjustably supporting said electromagnets, said means comprising gripping rings adapted to be disposed concentric with said eleetromagnets, supporting cables, each having one of its ends secured to said gripping rings, and means for receiving the other ends of said cables and for varying the length thereof.

5. A device of the type described comprising a base, supports, a top having an elongated opening therethrough, said supports being disposed between said top and said base for supporting said top, cable-supporting and actuating members disposed upon said top in engagement with said elongated opening, cables carried by said cable-supporting and actuating members for support ing electromagnets having sockets therein, said base having main sockets adapted to be electrically connected to a source of current, auxiliary sockets, a switch, and means .for electrically connecting said auxiliary sockets with said main sockets when said. switch is turned on.

6. A device of the type described comprising a base, supports, a top having an elongated opening therethrough, said supports being disposed between said top and Said base for supporting said top, cable-supporting and actuating members disposed upon said top in en a ement with said elongated opening, cables carried by said. cablesupporting and actuating members for sup; porting electromagnets having sockets therein, said base having main sockets adapted to be electrically connected to a source of current, auxiliary sockets, a switch, means for electrically connecting said auxiliary sockets with said main sockets When said switch is turned on, end sockets disposed in mi top, center sockets disposed in said top, ineans'for electrically connecting said end sockets with their respective center sockets, a relatively short set of conductor cords each cord having plug upon each. end, each plug being adapted to be disposed in a socket of a desired set of said sockets, and a relatively, long set of conductor cords having plugs upon, the ends thereof each of saidplugs being adapted to be disposed in a socket of other sets of said sockets.

= 7. A device of the type described comprising a base,'a top having an elongated opening therein, cable-supporting and actuating members disposed upon said top and in registration with said opening, supports disposed between said base and said top and secured in place, each of said supports being adapted to be rotated with respect to said base and saidtop and having openings therethrough, relatively short supporting bars extending through the openings in said supports, a gripping ring'secured to the outer end of each of said supporting bars, cables each having its upper end carried by one of said cable-supporting and actuatingniembers and its other end extending through one of said gripping rings and secured to a relatively long core having electromagnets inovably disposed thereupon and each provided with socket-s, main sockets disposedin said base, two sets of auxiliary sockets disposed in said base, a switch for each 0i said sets of auxiliary sockets adapted to electrically connect said auxiliary sockets with said main sockets, said main sockets being adapted to be electrically connected to a source of current, and relatively short sets of conductor cords each cord provided With a plug adapted to be disposed in a socket formed of each of said sets of auxiliary sockets and a socket in each of said clectroinagnets.

8. A device of the type described C0111- prisingra base, supporting members provided with openings carried by said base, a top having a relatively long opening therethrough disposed upon said supporting members, relatively long supporting bars, relatively short supporting bars, said supports having openings therethrough, elec-' trical experimenting devices, said supporting bars being adapted to be securedto said supports at the openings therein for supporting 1 said electrical experimenting de- 

